I have an allotment that I wish to use next year to grow veg and potatoes. It is covered with a variety of different weeds. Is there a weedkiller I can use on an allotment or do I just have to dig the weeds up by hand?

You can use weed killers if you don't intend to plant for a few months, as the chemicals will have died off by then but as an organic gardener there is no alternative too good old fashioned double digging!